Why Is My Air Conditioner Making A Noise?

Hearing odd noises when your air conditioner is on? There’s probably something wrong with your unit. If you don’t pay attention to it, it could lead to extensive—and expensive—troubles later. We’re going to help you find out what’s occurring with your air conditioner and what you can do to correct it. 

8 Common Air Conditioning Noises 

  • Gurgling – Gurgling generally indicates an issue with your refrigerant line. If you can’t determine where the noise is coming from, that’s alright. A professional can help determine where this noise is occurring.
  • Crackling – Crackling could result from debris in the unit or aging ductwork. Debris in the outdoor unit will cause a noise outside your house. Mature ductwork can produce noise inside your house.
  • Hissing – Hissing sounds coming from your AC can be caused by a faulty refrigerant line, an internal valve leak or the compressor.
  • Buzzing – Buzzing is no doubt an electrical issue.
  • Clicking – Clicking can mean you have a loose part or that the fan is misaligned.
  • Pulsating – Pulsating can be due to a loose part.
  • Loud Noise – A loud noise from your external unit can indicate an issue with your compressor, damper, fan or air handler.
  • Humming – Humming can begin with fan motor issues or a damaged relay switch. Read through our humming noise guide for more information. 

You can find more information about frequent air conditioning troubles on energy.gov 

Should I keep using my air conditioner when it’s making a noise? 

There are some cases where you can continue to run your AC, but you do so at your own risk. It’s almost impossible to answer this question without inspecting your system. 

Most of the time, we recommend shutting down the unit off and calling a professional. 

When should I do something about the noise? 

We recommend calling a professional as soon as you recognize there’s something wrong with your system. While AC repairs can be stressful and an unexpected expense, it’s best to get problems corrected right away. Getting a professional could help lower future expenses and keep your system running longer. 

Not sure if your air conditioner is making any of these noises? Please schedule online for a free, in-home consultation. 

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